"I have not talked to Bill Cosby on the phone in I don't know how long," the 35-year-old actress said on "The Celebrity Apprentice" season seven premiere Sunday night.

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Well-known as Rudy Huxtable, the youngest child on "The Cosby Show," Pulliam was questioned by Donald Trump as to why she didn't reach out to the comedian for a charity challenge on the Jan. 4 episode, which was recorded prior to the recent sexual assault allegations brought against him.

"For me to pick up the phone having not talked to you for five years, except for when we run into each other for a Cosby event, I feel that's not my place to do," she explained to Trump.

But the 68-year-old businessman still blamed her — the project manager — for the loss of her team, which included Kate Gosselin, Vivica A. Fox, Shawn Johnson, Brandi Glanville, Kenya Moore and Leeza Gibbons.

Having previously insisted that her time on the hit '80s sitcom taught her "the importance of philanthropy and giving back to others," Trump didn't buy her excuse for not calling Cosby.

"You didn't make one call that I really believe that if you'd called that gentleman he would have helped you, even if you hadn't spoken to him in years," he said.

"You were an amazing team with one of the most successful shows ever, so I think it would have been a good call to make for charity," Trump added. "You have to take responsibility."

Donald Trump defended his decision to fire Pulliam — and continued to slam her decision to not contact Bill Cosby. (NBC)

He did donate $25,000 to her charity, Kamp Kizzy, which Pulliam was playing for, before he said those two words no one ever likes to hear on Trump's show, "You're fired."

"This show was taped just before the terrible Bill Cosby revelations came to light," Trump tweeted after the show aired.

Staying focused on the business at hand, Trump also stood by his decision to fire Pulliam.

"She still should have asked him for money," he tweeted. "Goes to charity."

Pulliam defended her decision not to call Cosby on the "Today" show Monday.

"I know 'The Cosby Show' is in reruns, and everyone thinks that we're this family that has dinner every Friday night," she told Savannah Guthrie. "But the reality was I hadn't spoken to Mr. Cosby. I felt that it would be tactless, very rude to call someone and be like, 'Hey, so, let me have some money right now.'"

Women who have accused Bill Cosby of sexual assault

As for the allegations brought against the famed comedian, Pulliam said, "What I can say is this: I wasn't there. No one was there except for the two people who know exactly what happened. All I can speak to is the man that I know and I love. The fact that he's been such an example, you can't take away from the great that he has done. You know, the amount ... the millions and millions of dollars that he has given back to colleges and education, and just what he did with 'The Cosby Show' and how groundbreaking that was."